package com.moli.iov.util;

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

/**
 * <p>
 *
 * </p>
 *
 * @author
 * @since 2019/9/12 10:17
 */
public class BeanUtils {

  /**
   * map 转 bean
   * @param map
   * @param beanClass
   * @return
   * @throws Exception
   */
  public static Object mapToObject(Map<String, Object> map, Class<?> beanClass) throws Exception {
    if (map == null) {
      return null;
    }

    Object obj = beanClass.newInstance();

    BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
    PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
    for (PropertyDescriptor property : propertyDescriptors) {
      Method setter = property.getWriteMethod();
      if (setter != null) {
        setter.invoke(obj, map.get(property.getName()));
      }
    }

    return obj;
  }

  /**
   * bean 转 map
   * @param obj
   * @return
   * @throws Exception
   */
  public static Map<String, Object> objectToMap(Object obj) throws Exception {
    if(obj == null) {
      return null;
    }

    Map<String, Object> map = new HashMap<String, Object>();

    BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
    PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
    for (PropertyDescriptor property : propertyDescriptors) {
      String key = property.getName();
      if (key.compareToIgnoreCase("class") == 0) {
        continue;
      }
      Method getter = property.getReadMethod();
      Object value = getter!=null ? getter.invoke(obj) : null;
      map.put(key, value);
    }

    return map;
  }
}
